IIO FUMIGATION METHODS 



those shown in Figs. 64 and 65 will serve as examples. 

 Figure 64 is a view of a double house. It has two 

 separate compartments. While a load of trees is being 

 fumigated in one compartment, ventilation is taking 

 place in the other. It has two thicknesses of lumber, 

 one matched, tongue and grooved, the other either the 



FIG. 65 CANADIAN FUMIGATING HOUSE AT THE ONTARIO 

 AGRICULTURAL COLLEGE 



same or cover-siding well-matched, and two thicknesses 

 of paper between. The doors are the same and padded 

 all around. 



Figure 65 shows the fumigation house at the Agri- 

 cultural College at Guelph, Canada. It is substan- 

 tially built, dressed lumber being used in its construc- 

 tion. Its size is 10x8x7^ feet. It contains 600 

 cubic feet. The frame, of 2 x 4 inch scantling, has two 



